syzkaller login: [ 33.867147] BUG: Bad rss-counter state mm:00000000779961fb type:MM_FILEPAGES val:33 [ 33.868234] BUG: Bad rss-counter state mm:00000000779961fb type:MM_ANONPAGES val:22 [ 34.036792] ================================================================== [ 34.037936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.039084] Read of size 8 at addr ffff88800e036798 by task sshd/220 [ 34.040040] [ 34.040262] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.041150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.042192] Call Trace: [ 34.042523] [ 34.042816] dump_stack_lvl+0x91/0xf0 [ 34.043317] print_report+0xcc/0x620 [ 34.043811] ? __virt_addr_valid+0x102/0x340 [ 34.044426] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.045062] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.045693] kasan_report+0xbe/0xf0 [ 34.046186] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.046825] vma_interval_tree_remove+0xc75/0xec0 [ 34.047434] vma_prepare+0xc54/0x11a0 [ 34.047968] __split_vma+0x5af/0x950 [ 34.048457] ? __pfx___split_vma+0x10/0x10 [ 34.049002] ? find_held_lock+0x2c/0x110 [ 34.049550] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.050152] ? lock_is_held_type+0x9f/0x120 [ 34.050703] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.051340] ? mtree_range_walk+0x632/0x900 [ 34.051913] ? mas_walk+0x5c7/0x7c0 [ 34.052408] do_vmi_munmap+0x1f1/0x2b0 [ 34.052919] mmap_region+0x1f9/0x2660 [ 34.053420] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.053946] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.054680] ? __pfx_lock_acquire+0x10/0x10 [ 34.055231] ? __pfx_mmap_region+0x10/0x10 [ 34.055774] ? security_mmap_addr+0x7d/0xa0 [ 34.056331] ? get_unmapped_area+0x1f5/0x3f0 [ 34.056900] do_mmap+0x854/0xf00 [ 34.057347] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.057856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.058441] ksys_mmap_pgoff+0x3af/0x500 [ 34.058965] do_syscall_64+0x3f/0x90 [ 34.059453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.060144] RIP: 0033:0x7fefdfd23d82 [ 34.060621] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 34.062816] RSP: 002b:00007fff255cabf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.063753] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefdfd23d82 [ 34.064634] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefdf15d000 [ 34.065520] RBP: 00007fefdf15d000 R08: 0000000000000009 R09: 0000000000001000 [ 34.066396] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c323a4cec0 [ 34.067275] R13: 00007fff255cac10 R14: 00007fff255cac40 R15: 00007fff255cafa0 [ 34.068177] [ 34.068474] [ 34.068692] Allocated by task 213: [ 34.069134] kasan_save_stack+0x22/0x50 [ 34.069652] kasan_set_track+0x25/0x30 [ 34.070161] __kasan_slab_alloc+0x59/0x70 [ 34.070697] kmem_cache_alloc+0x16b/0x370 [ 34.071228] vm_area_dup+0x20/0x160 [ 34.071701] __split_vma+0x170/0x950 [ 34.072194] split_vma+0xc6/0x110 [ 34.072638] mprotect_fixup+0x8d2/0xb30 [ 34.073152] do_mprotect_pkey+0x87e/0xd40 [ 34.073688] __x64_sys_mprotect+0x78/0xc0 [ 34.074219] do_syscall_64+0x3f/0x90 [ 34.074707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.075381] [ 34.075602] Freed by task 213: [ 34.076012] kasan_save_stack+0x22/0x50 [ 34.076529] kasan_set_track+0x25/0x30 [ 34.077032] kasan_save_free_info+0x2b/0x50 [ 34.077587] __kasan_slab_free+0x10a/0x190 [ 34.078129] kmem_cache_free+0x10d/0x4d0 [ 34.078633] rcu_core+0x8c8/0x2860 [ 34.079077] __do_softirq+0x1b7/0x7d4 [ 34.079562] [ 34.079772] Last potentially related work creation: [ 34.080361] kasan_save_stack+0x22/0x50 [ 34.080863] __kasan_record_aux_stack+0x8e/0xa0 [ 34.081429] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.082076] remove_vma+0x139/0x170 [ 34.082530] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.083081] do_vmi_munmap+0x1f1/0x2b0 [ 34.083563] __vm_munmap+0x138/0x3a0 [ 34.084033] __x64_sys_munmap+0x59/0x80 [ 34.084523] do_syscall_64+0x3f/0x90 [ 34.085000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.085636] [ 34.085849] Second to last potentially related work creation: [ 34.086542] kasan_save_stack+0x22/0x50 [ 34.087046] __kasan_record_aux_stack+0x8e/0xa0 [ 34.087616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.088256] remove_vma+0x139/0x170 [ 34.088705] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.089260] do_vmi_munmap+0x1f1/0x2b0 [ 34.089738] mmap_region+0x1f9/0x2660 [ 34.090210] do_mmap+0x854/0xf00 [ 34.090635] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.091117] ksys_mmap_pgoff+0x3af/0x500 [ 34.091610] do_syscall_64+0x3f/0x90 [ 34.092109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.092756] [ 34.092994] The buggy address belongs to the object at ffff88800e036740 [ 34.092994] which belongs to the cache vm_area_struct of size 168 [ 34.094454] The buggy address is located 88 bytes inside of [ 34.094454] freed 168-byte region [ffff88800e036740, ffff88800e0367e8) [ 34.095858] [ 34.096081] The buggy address belongs to the physical page: [ 34.096736] page:00000000a40a2203 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe036 [ 34.097807] memcg:ffff88800db50c01 [ 34.098230] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.098870] page_type: 0xffffffff() [ 34.099318] raw: 0100000000000200 ffff88800879fc80 ffffea00003689c0 dead000000000002 [ 34.100233] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db50c01 [ 34.101136] page dumped because: kasan: bad access detected [ 34.101790] [ 34.102005] Memory state around the buggy address: [ 34.102588] ffff88800e036680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.103450] ffff88800e036700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.104314] >ffff88800e036780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.105159] ^ [ 34.105646] ffff88800e036800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.106508] ffff88800e036880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.107352] ================================================================== [ 34.108337] Disabling lock debugging due to kernel taint [ 36.087632] BUG: Bad rss-counter state mm:00000000bb77827a type:MM_FILEPAGES val:33 [ 36.089172] BUG: Bad rss-counter state mm:00000000bb77827a type:MM_ANONPAGES val:22 [ 36.543113] BUG: Bad rss-counter state mm:0000000047b9fa07 type:MM_FILEPAGES val:33 [ 36.544142] BUG: Bad rss-counter state mm:0000000047b9fa07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21138' (ECDSA) to the list of known hosts. 2023/06/19 16:55:31 fuzzer started 2023/06/19 16:55:32 dialing manager at localhost:44161 2023/06/19 16:55:32 checking machine... 2023/06/19 16:55:32 checking revisions... [ 37.242609] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:55:32 testing simple program... [ 37.288312] cgroup: Unknown subsys name 'net' [ 37.366338] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:55:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff846000aa RCX=0000000000000001 RDX=1ffff1100207fe64 RSI=ffff8880103fff48 RDI=ffffffff846000aa RBP=ffffffff846000aa RSP=ffff8880103ff278 R8 =0000000000000001 R9 =ffff8880103ff308 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000001 R13=0000000000000000 R14=ffff888014680000 R15=0000000000000cc0 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0492415900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fc72b230650 CR3=000000000c5b8000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ff45f8facf0eb56500000000000ae988 XMM05=71b51229885cf09d00000000001369c8 XMM06=4fda316b135da52b00000000001357b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd3017bc18 CR3=0000000017b16000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2031333a35353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a35353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000